Evidence map›Paper›PMID 35585522›Full record

ArticleBMC pregnancy and childbirth2022

Cesarean delivery in Norwegian nulliparous women with singleton cephalic term births, 1967-2020: a population-based study.

Yeneabeba Tilahun Sima, Rolv Skjærven, Liv Grimstvedt Kvalvik, Nils-Halvdan Morken, Kari Klungsøyr, Linn Marie Sørbye

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Article in BMC pregnancy and childbirth, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

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2citing papers in PubMed
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1 · What the graph read from it

What it found

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3 · Its place in the literature

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2 citing papers in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

6 authors.

Yeneabeba Tilahun SimaDepartment of Global Public Health and Primary Care, University of Bergen, Bergen, Norway. Yeneabeba.Sima@uib.no.
Rolv SkjærvenDepartment of Global Public Health and Primary Care, University of Bergen, Bergen, Norway.
Liv Grimstvedt KvalvikDepartment of Global Public Health and Primary Care, University of Bergen, Bergen, Norway.
Nils-Halvdan MorkenDepartment of Clinical Science, University of Bergen, Bergen, Norway.
Kari KlungsøyrDepartment of Global Public Health and Primary Care, University of Bergen, Bergen, Norway.
Linn Marie SørbyeNorwegian Research Centre for Women's Health, Oslo University Hospital, Rikshospitalet, Oslo, Norway.

Funding

The European Research Council under the European Union's Horizon 2020 Research and Innovation Program ERC advanced grant 2018, agreement No 833076
6 · The paper itself

Abstract

backgroundNulliparous women contribute to increasing cesarean delivery in the Nordic countries and advanced maternal age has been suggested as responsible for rise in cesarean delivery rates in many developed countries. The aim was to describe changes in cesarean delivery rates among nulliparous women with singleton, cephalic, term births by change in sociodemographic factors across 50 years in Norway.

methodsWe used data from the Medical Birth Registry of Norway and included 1 067 356 women delivering their first, singleton, cephalic, term birth between 1967 and 2020. Cesarean delivery was described by maternal age (5-year groups), onset of labor (spontaneous, induced and pre-labor CD), and time periods: 1967-1982, 1983-1998 and 1999-2020. We combined women's age, onset of labor and time period into a compound variable, using women of 20-24 years, with spontaneous labor onset during 1967-1982 as reference. Multivariable regression models were used to estimate adjusted relative risk (ARR) of cesarean delivery with 95% confidence interval (CI).

resultsOverall cesarean delivery increased both in women with and without spontaneous onset of labor, with a slight decline in recent years. The increase was mainly found among women < 35 years while it was stable or decreased in women >  = 35 years. In women with spontaneous onset of labor, the ARR of CD in women >  = 40 years decreased from 14.2 (95% CI 12.4-16.3) in 1967-82 to 6.7 (95% CI 6.2-7.4) in 1999-2020 and from 7.0 (95% CI 6.4-7.8) to 5.0 (95% CI 4.7-5.2) in women aged 35-39 years, compared to the reference population. Despite the rise in induced onset of labor over time, the ARR of CD declined in induced women >  = 40 years from 17.6 (95% CI 14.4-21.4) to 13.4 (95% CI 12.5-14.3) while it was stable in women 35-39 years.

conclusionDespite growing number of Norwegian women having their first birth at a higher age, the increase in cesarean delivery was found among women < 35 years, while it was stable or decreased in older women. The increase in cesarean delivery cannot be solely explained by the shift to an older population of first-time mothers.

Indexed as

Labor, ObstetricTerm BirthAdultAgedCesarean SectionFemaleHumansMaternal AgeParityPregnancyYoung AdultCesarean deliveryNorwayPopulation-based studyRobson groups

Identifiers

PMID35585522
PMCPMC9118652

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.